CN217428008U - Three-phase alternating current input airborne power supply - Google Patents
Three-phase alternating current input airborne power supply Download PDFInfo
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- CN217428008U CN217428008U CN202220632344.4U CN202220632344U CN217428008U CN 217428008 U CN217428008 U CN 217428008U CN 202220632344 U CN202220632344 U CN 202220632344U CN 217428008 U CN217428008 U CN 217428008U
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Abstract
The application discloses three-phase alternating current input's machine carries power relates to machine carries power technical field, has solved among the prior art conversion efficiency of machine carries power low, to the little scheduling problem of accommodation of input frequency. The scheme comprises a three-phase alternating voltage input module, a three-phase EMI filtering module, an AC-DC module, a DD-DC module and an output filtering module; the output end of the three-phase alternating voltage input module is connected with the input end of the three-phase EMI filtering module; the output end of the three-phase EMI filtering module is connected with the input end of the AC-DC module; the output end of the AC-DC module is connected with the input end of the DD-DC module; the output end of the DD-DC module is connected with the input end of the output filtering module, and the output end of the output filtering module outputs the converted direct-current voltage. Through adopting the utility model discloses a three-phase alternating current input's machine carries power, has realized that conversion efficiency is high, to purpose such as the accommodation width of input frequency is wide.
Description
Technical Field
The application relates to the technical field of airborne power supplies, in particular to an airborne power supply with three-phase alternating current input.
Background
The three-phase ac power supply is composed of three ac potentials with the same frequency, the same amplitude, and the phase difference of 120 ° in sequence. Three-phase alternating current has many advantages compared with single-phase alternating current, and has obvious advantages in power generation, power transmission and distribution and the aspect of converting electric energy into mechanical energy, so that the three-phase alternating current is widely applied.
The existing most of electric appliances are internally provided with an alternating current/direct current conversion circuit, alternating current voltage obtained from a three-phase alternating current power supply is converted into direct current voltage for self use, and when the three-phase alternating current power supply inputs 115V voltage, twelve, eighteen or more pulse wave transformers are generally adopted, and front-end rectification is completed through special process winding so as to realize input harmonic suppression, but the input total harmonic content is higher, so that the voltage conversion efficiency of an airborne power supply can be reduced, and the application range of the power supply to input frequency is reduced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application solves the problems that an airborne power supply in the prior art is low in conversion efficiency, small in application range of input frequency and the like, and achieves the purposes of high conversion efficiency, wide application range of input frequency and the like.
The embodiment of the utility model provides a three-phase AC input's machine carries power, include: the device comprises a three-phase alternating voltage input module, a three-phase EMI filtering module, an AC-DC module, a DD-DC module and an output filtering module;
the output end of the three-phase alternating voltage input module is connected with the input end of the three-phase EMI filtering module;
the output end of the three-phase EMI filtering module is connected with the input end of the AC-DC module;
the output end of the AC-DC module is connected with the input end of the DD-DC module;
the output end of the DD-DC module is connected with the input end of the output filtering module, and the output end of the output filtering module outputs the converted direct-current voltage.
Furthermore, a plurality of the DD-DC modules are provided, and input ends of the plurality of DD-DC modules are all connected to an output end of the AC-DC module, and output ends of the plurality of DD-DC modules are respectively connected to one output filtering module.
Furthermore, the device also comprises an auxiliary power supply module and a control module;
the input end of the auxiliary power supply module is connected with the output end of the AC-DC module, and the output end of the auxiliary power supply module is connected with the input end of the control module;
and the output end of the control module is connected with the input end of the DD-DC module.
Furthermore, the output end of the AC-DC module is also connected with the input end of the control module.
Furthermore, the AC-DC module adopts a three-phase level Boost PFC conversion circuit.
Furthermore, the three-phase level Boost PFC conversion circuit comprises a first voltage U a A second voltage U b A third voltage U c A first inductor L a A second inductor L b A third inductor L c A first diode D 1 A second diode D 2 A third diode D 3 A fourth diode D 4 A fifth diode D 5 A sixth diode D 6 A first capacitor C 1 A second capacitor C 2 ；
The first voltage U a The secondVoltage U b And said third voltage U c Are connected in parallel, and the first voltage U a Is connected to the first inductor L a Said first inductance L a Is connected with the first diode D 1 The first diode D 1 Is connected with the first capacitor C 1 An input terminal of (1);
the second voltage U b Is connected to the second inductor L b Said second inductance L b Is connected to the second diode D 2 Said second diode D 2 Is connected with the first capacitor C 1 An input terminal of (a);
the third voltage U c Is connected with the third inductor L c Said third inductance L c Is connected to the third diode D 3 Said third diode D 3 Is connected with the first capacitor C 1 An input terminal of (a);
the fourth diode D 4 Is connected to the first inductor L a Of the fourth diode D 4 Is connected to the second capacitor C 2 Said second capacitor C 2 Is connected with the first capacitor C 1 An output terminal of (a);
the fifth diode D 5 Is connected to the second inductor L b The output terminal of the fifth diode D 5 Is connected to the second capacitor C 2 An input terminal of (a);
the sixth diode D 6 Is connected with the third inductor L c The output terminal of the sixth diode D 6 Is connected to the second capacitor C 2 To the input terminal of (1).
Furthermore, the three-phase level Boost PFC conversion circuit further comprises a first bidirectional switch S 1 A second bidirectional switch S 2 A third two-way switch S 3 ；
The first bidirectional switch S 1 Is connected to the first inductor L a Said first bidirectional switch S 1 Is connected to the first capacitor C 1 An output terminal of (a);
the second bidirectional switch S 2 Is connected to the second inductor L b Said second bidirectional switch S 2 Is connected with the first capacitor C 1 An output terminal of (a);
the third bidirectional switch S 3 Is connected to the third inductor L c The output terminal of (1), the third bidirectional switch S 3 Is connected with the first capacitor C 1 To the output terminal of (a).
The embodiment of the utility model provides an in one or more technical scheme, following technological effect or advantage have at least:
the embodiment of the utility model provides a three-phase AC input's machine carries power, including three-phase AC voltage input module, three-phase EMI filtering module, AC-DC module, DD-DC module and the output filtering module who connects gradually, can realize AC/DC conversion and electrical isolation, can convert three-phase 115V alternating current to multichannel isolation, steady voltage direct current 48V. Through adopting the utility model discloses a three-phase AC input's machine carries power, effectively solved among the prior art conversion efficiency of machine carries power low, to the little scheduling problem of accommodation of input frequency, realized that conversion efficiency is high, to the accommodation of input frequency purpose such as wide.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first structural diagram of an onboard power supply provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of an onboard power supply according to an embodiment of the present application;
fig. 3 is a circuit diagram of an onboard power supply three-phase power factor correction circuit provided in an embodiment of the present application.
An icon: 1. a three-phase alternating current voltage input module; 2. a three-phase EMI filtering module; 3. an AC-DC module; 4. a DD-DC module; 5. an output filtering module; 6. an auxiliary power supply module; 7. and a control module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of description and simplification of the description of the embodiments of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, an embodiment of the present invention provides an onboard power supply with three-phase ac input, including: the device comprises a three-phase alternating voltage input module 1, a three-phase EMI filtering module 2, an AC-DC module 3, a DD-DC module 4 and an output filtering module 5; the output end of the three-phase alternating voltage input module 1 is connected with the input end of the three-phase EMI filtering module 2; the output end of the three-phase EMI filtering module 2 is connected with the input end of the AC-DC module 3; the output end of the AC-DC module 3 is connected with the input end of the DD-DC module 4; the output end of the DD-DC module 4 is connected with the input end of the output filter module 5, and the output end of the output filter module 5 outputs the converted direct-current voltage.
Topological structure among the prior art can't carry out the modularized design to topological structure is applicable to high-power occasion, and the utility model discloses a three-phase AC input's machine carries power, directly converts three-phase 115V alternating voltage into 36V direct current constant voltage power supply, has realized the step-down isolation in its inside, can improve input frequency's application scope.
The embodiment of the utility model provides a three-phase AC input's machine carries power, including three-phase AC voltage input module 1, three-phase EMI filtering module 2, AC-DC module 3, DD-DC module 4 and the output filtering module 5 that connects gradually, can realize AC/DC conversion and electrical isolation, can convert three-phase 115V alternating current to the multichannel and keep apart, steady voltage direct current 48V. Through adopting the utility model discloses a three-phase AC input's machine carries power, effectively solved among the prior art the conversion efficiency of machine carries power low, to the adaptation scope little scheduling problem of input frequency, realized that conversion efficiency is high, to the adaptation scope of input frequency purpose such as wide.
As shown in fig. 2, a plurality of DD-DC modules 4 are provided, and the input ends of the plurality of DD-DC modules 4 are all connected to the output end of the AC-DC module 3, and the output ends of the plurality of DD-DC modules 4 are respectively connected to one output filter module 5.
In this embodiment, specifically, three DD-DC modules 4 are provided, the input ends of the three DD-DC modules 4 are all connected to the output end of the AC-DC module 3, the output ends of the three DD-DC modules 4 are respectively connected to one output filter module 5, and the three-phase output current is filtered and then output, so as to ensure the stability of the output voltage.
Referring to fig. 1 and 2, the three-phase ac input onboard power supply of the present embodiment further includes an auxiliary power supply module 6 and a control module 7; the input end of the auxiliary power supply module 6 is connected with the output end of the AC-DC module 3, and the output end of the auxiliary power supply module 6 is connected with the input end of the control module 7; the output end of the control module 7 is connected with the input end of the DD-DC module 4.
In this embodiment, the input end of the auxiliary power module 6 is connected to the output end of the AC-DC module 3, the auxiliary power module 6 further supplies power to the control module 7 by receiving a signal transmitted by the AC-DC module 3, so that the control module 7 controls the three DD-DC modules 4 to be turned on or off when receiving an external control signal, and meanwhile, the control module 7 outputs a rectification state signal indicating whether the DD-DC module 4 is turned on or off, so that a worker can know the working state of the DD-DC module 4.
As shown in fig. 2, the output of the AC-DC module 3 is also connected to the input of the control module 7.
In this embodiment, the AC-DC module 3 converts the 115V AC voltage input by the three-phase AC voltage input module 1 to a DC regulated 270V, and connects the output terminal of the AC-DC module 3 to the input terminal of the control module 7, and the control module 7 may perform rectification monitoring on the AC-DC module 3.
As a further optimization of the present embodiment, the AC-DC module 3 adopts a three-phase level Boost PFC conversion circuit.
The input of the traditional three-phase 115V alternating current input alternating current power supply adopts twelve, eighteen and more pulse wave transformers for rectification, and the input harmonic suppression is realized by finishing front-end rectification through special process winding, so that the total input harmonic content is less than 10 percent. The three-phase rectifier in the embodiment adopts a three-phase PFC corrector, the corrector adopts a three-phase level Boost PFC conversion circuit, power factor correction and rectification are performed through a switching power supply topological structure, and the method for completing input power factor correction by utilizing the switching technology can enable the input PF value to reach over 0.99, the input total harmonic content THD to be less than 5%, the input harmonic is reduced, and the high-frequency interference on the input is reduced.
Furthermore, the three-phase level Boost PFC conversion circuit comprises a first voltageU a A second voltage U b A third voltage U c A first inductor L a A second inductor L b A third inductor L c A first diode D 1 A second diode D 2 A third diode D 3 A fourth diode D 4 A fifth diode D 5 A sixth diode D 6 A first capacitor C 1 A second capacitor C 2 . Wherein, in particular, as shown in conjunction with fig. 3, the first voltage U a A second voltage U b And a third voltage U c Are connected in parallel and have a first voltage U a Is connected with the first inductor L a The first inductor L a Is connected with a first diode D 1 The first diode D 1 Is connected with a first capacitor C 1 An input terminal of (1); second voltage U b Is connected with the second inductor L b Of the second inductor L b Is connected with a second diode D 2 Input terminal of, a second diode D 2 Is connected with a first capacitor C 1 An input terminal of (1); third voltage U c Is connected with a third inductor L c Of the third inductor L c Is connected with a third diode D 3 Input terminal of (2), third diode D 3 Is connected with a first capacitor C 1 An input terminal of (1); fourth diode D 4 Is connected with a first inductor L a Of the fourth diode D 4 Is connected with a second capacitor C 2 Of the second capacitor C 2 Is connected with a first capacitor C 1 An output terminal of (a); fifth diode D 5 Is connected with a second inductor L b Output terminal of (1), a fifth diode D 5 Is connected with a second capacitor C 2 An input terminal of (1); sixth diode D 6 Is connected with a third inductor L c An output terminal of the sixth diode D 6 Is connected with a second capacitor C 2 To the input terminal of (1).
In addition, as shown in fig. 3, the three-phase level Boost PFC conversion circuit further includes a resistor R, and one end of the resistor R is connected to the resistor RIs connected with a first capacitor C 1 The other end of the input end is connected with a second capacitor C 2 To the output terminal of (a). Compare in traditional rectification mode, this kind of novel structure still has multiple input protect function, inputs and crosses undervoltage, output and overflows, protection such as excess temperature.
With reference to fig. 3, the three-phase level Boost PFC conversion circuit further includes a first bidirectional switch S 1 A second bidirectional switch S 2 A third two-way switch S 3 (ii) a First bidirectional switch S 1 Is connected with a first inductor L a Output terminal of (2), first bidirectional switch S 1 Is connected with a first capacitor C 1 An output terminal of (a); second bidirectional switch S 2 One end of is connected with the second inductor L b Of the second bidirectional switch S 2 Is connected with a first capacitor C 1 An output terminal of (a); third bidirectional switch S 3 Is connected with a third inductor L c Output terminal of (2), third bidirectional switch S 3 The other end of the first capacitor C is connected with 1 To the output terminal of (a).
In this embodiment, each phase of output current is controlled by the bidirectional switch to flow to the output terminal with a high level or a low level, so that the output current is continuous and the conversion efficiency is high.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.
Claims (7)
1. The three-phase alternating current input airborne power supply is characterized by comprising a three-phase alternating current voltage input module (1), a three-phase EMI filtering module (2), an AC-DC module (3), a DD-DC module (4) and an output filtering module (5);
the output end of the three-phase alternating voltage input module (1) is connected with the input end of the three-phase EMI filtering module (2);
the output end of the three-phase EMI filtering module (2) is connected with the input end of the AC-DC module (3);
the output end of the AC-DC module (3) is connected with the input end of the DD-DC module (4);
the output end of the DD-DC module (4) is connected with the input end of the output filtering module (5), and the output end of the output filtering module (5) outputs the converted direct-current voltage.
2. A three-phase AC input on-board power supply according to claim 1, characterized in that a plurality of DD-DC modules (4) are provided, and the input ends of a plurality of DD-DC modules (4) are connected to the output end of the AC-DC module (3), and the output ends of a plurality of DD-DC modules (4) are connected to one output filter module (5).
3. The three-phase AC input on-board power supply according to claim 1, characterized in that it further comprises an auxiliary power supply module (6) and a control module (7);
the input end of the auxiliary power supply module (6) is connected with the output end of the AC-DC module (3), and the output end of the auxiliary power supply module (6) is connected with the input end of the control module (7);
the output end of the control module (7) is connected with the input end of the DD-DC module (4).
4. -the three-phase alternating current input on-board power supply according to claim 3, characterized in that the output of said AC-DC module (3) is also connected to the input of said control module (7).
5. The three-phase alternating current input on-board power supply according to claim 1, characterized in that the AC-DC module (3) employs a three-phase level Boost PFC conversion circuit.
6. The three-phase AC-input on-board power supply of claim 5, wherein the three-phase level Boost PFC conversion circuit comprises a first voltage U a A second voltage U b A third voltage U c A first inductor L a A second inductor L b A third inductor L c A first diode D 1 A second diode D 2 A third diode D 3 A fourth diode D 4 A fifth diode D 5 A sixth diode D 6 A first capacitor C 1 A second capacitor C 2 ；
The first voltage U a The second voltage U b And said third voltage U c Are connected in parallel, and the first voltage U a Is connected to the first inductor L a Said first inductance L a Is connected with the first diode D 1 The first diode D 1 Is connected with the first capacitor C 1 An input terminal of (a);
the second voltage U b Is connected to the second inductor L b Said second inductance L b Is connected to the second diode D 2 Said second diode D 2 Is connected with the first capacitor C 1 An input terminal of (1);
the third voltage U c Is connected to the third inductor L c Said third inductance L c Is connected to the third diode D 3 Said third diode D 3 Is connected with the first capacitor C 1 An input terminal of (1);
the fourth diode D 4 Is connected to the first inductor L a The output terminal of the fourth diode D 4 Is connected to the second capacitor C 2 Said second capacitor C 2 Is connected with the first capacitor C 1 An output terminal of (a);
the fifth diode D 5 Is connected to the second inductor L b The output terminal of the fifth diode D 5 Is connected to the second capacitor C 2 An input terminal of (1);
the sixth diode D 6 Is connected with the third inductor L c The output terminal of the sixth diode D 6 Is connected to the second capacitor C 2 To the input terminal of (1).
7. The three-phase AC-input onboard power supply according to claim 6, wherein the three-phase level Boost PFC conversion circuit further comprises a first bidirectional switch S 1 A second bidirectional switch S 2 A third two-way switch S 3 ；
The first bidirectional switch S 1 Is connected to the first inductor L a Said first bidirectional switch S 1 Is connected with the first capacitor C 1 An output terminal of (a);
said second bidirectional switch S 2 Is connected to the second inductor L b Said second bidirectional switch S 2 Is connected with the first capacitor C 1 An output terminal of (a);
the third bidirectional switch S 3 Is connected to the third inductance L c The output terminal of (1), the third bidirectional switch S 3 Is connected with the first capacitor C 1 To the output terminal of (a).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220632344.4U CN217428008U (en) | 2022-03-23 | 2022-03-23 | Three-phase alternating current input airborne power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220632344.4U CN217428008U (en) | 2022-03-23 | 2022-03-23 | Three-phase alternating current input airborne power supply |
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| CN217428008U true CN217428008U (en) | 2022-09-13 |
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| CN202220632344.4U Active CN217428008U (en) | 2022-03-23 | 2022-03-23 | Three-phase alternating current input airborne power supply |
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